LIVERMORE — A big rig carrying approximately 33 tons of clothes jackknifed on Interstate 580 north of Flynn Road on Monday, damaging at least one other car in the process but appearing not to injure anyone severely, a California Highway Patrol dispatcher said.

The CHP issued a traffic alert after the 5:15 p.m. wreck forced closure of the two left lanes in the eastbound direction, Officer Ralph Caggiano said.

It was unclear what caused the truck to jackknife, or whether it actually tipped over, Caggiano said, but a Toyota Camry sustained some front-end damage in the wreck.

Ambulances were on the scene, although Caggiano said there were no reports of any injured persons being taken away in them.

The two lanes reopened about 7:15 p.m. Drivers were advised to use Altamont Pass Road as an alternative route during the closure, Caggiano said.

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